Friction shock-absorbing mechanism



W. A. @5mm vrRlClON SHOCK ABSUHBNG MECHAMSM.

APPLCATION FILED IAN, I4. i921.

Patenwl Dec. 12, w22..

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e high P Des. l2, 2922.

Unir-'sn ermee 'Persi-er este. f

WILLIAI A. GRIGEB, 0F OEICAGD, ILLINOIS, SSIGIEOB T0 WILLIAH H.- miWAZ?, NEW YORK..

momen snoonnssonsme n.: s y. .f

enum mea neuen` is. 1am. sms: n. senese.

To an 'whom it may concern.'

Beit known that I, WILLIAM A. le:onn

resi a inthe .county of Cook and tete of Illlnois, have invented a.certain new and useful Ixfrovement in Friction Shoclbbsorbingechanisms, of which the following is d full; clear, concise, and exactdescnption, reference being had to the accom panymg drawings, yforming apart of thisy specification.

This invention relates to improvements in frictionshockabeorbingmechanisms.

The object o the invention is to 'prov-ids capecity 4friction shockabsorbing mechanism especially adapted for railway draft. ri 'ngeandwherem is obtain e gradua spring and friction action comf ined witheasy and certain release.

In the drawing forminpe pertifof th' speeicetion., Figure 1 is norinontal, lon tndinal, sectional' view of o -portlon o '-a railwaydrajtri g showingmy improvements in connection. therewith. Figure 2 isavertical, transverse sectional view-taken substantially on the line 2-2of 1. Fi re 3 is a perspective view of one o the weuge elements. And Fires 4 and 5 are perspective views of one o the movable and one of thestationary friction plates, respectively. Q

In said drewin 10-10de11ote channel draft sills of e ra' wey car to theinner faces of which are secured rear stop lugs 12. A portion of ndrawbar is indicated at 13, the same beinoperetively associated with theshock absor ing mechenism pro r by a hooded cest yoke 14 and coupler liy15 The yoke and movable parte within the some are suppgted 1n operativeposition by e pan' of hable saggia plates 16th-16. u t' I l oar n o mymven lon, emp e' V broad! and reanmain followers l? and 1 front end rearintermediate followers 19 en'd 20; twin arranged front springs 21; twinarranged rear a stationary casini; 23.; a. wedging evloe designatedgeneral y by the reference cherncter A; a series` of relativelystationary friction plates 24; and e series of rela' tively movablefriction plates 25.

The end main followers 17 and 18 engege and cooperate with the stop luin the usuel` manner. The intermediate ollowere "columns bein 'orslotted as in front stop lugs 11 end- 198Ild'md0 n0t6-8l1 l i 31)(1engage .the 'end wall s of theycasillig only -when the 'springs 21 or 22are com reescd to annbnormal d 'F as will bTelpvi an inspection ogure 1. e rings' 21 and 22 are interposed between thes'rcspective peg-sof followers 17 and 19,'and 20 and 18'.' ferably means for limiting thecompren` sion of lieto f l taking' e rmocoumnsorbars26-2r disposedwithin4 the various springs, said ofal hjcrrespon to thelengths or thesprmgs when the l r closed. l The casing 23 is of hollow rectangularbox-like form as best illustrated in Figure the same having top andbottom walls end side walls 28--28.y The latter are extended at theirends so esto provide is flanges 29-29 whereby the casi may. be rive edor otherwise ri 'd1' an permunently secured to the dralsills at thecenter v of the mechanism. 0n opposite sides of the center, the ossi 23is transversely icated'at 30-30 so as to .i into which-the relativelywideA-statonar friction platesilfl'iny be seated and hel againstlongitudinal move ment although free to respond to .lateral orversepressure. The movable friction plates 25 are alternated orinterenlated with the stationary plates24 seid movable plates beinlonger than the dimension of the cesing parallel to the center line of4the' mechanism. Said lates 25 'ere of e lenh slightly. less than henormal distance tweenthe intermediate followers 19and, 30 so es t0lcave'sl' ht spaces as indicatedat 81-31 between e said plates and thefollowers. isds ecin is left vin order fut 't the we evioe to come intoglad?! by preveiiiigg netual contact of the plates with both of .theintermediate fol- -owera mand 20 during the compressiomof the The device'i consists .of two uniteo like crm but o'pcsitely Each of said unitsinclu es e wedge-s spul block 82' having a, pair of conve f faces 38 and34, the letter extending l the centerline and the former exte ing-et anangle thereto. On the sidecorregponi ingto the face 34, each block B2i;d

springs are en iployed, the seme.'

grooved' lill 37-*37 are provided, iii-ranged iii pairs, the

same being edapted to accommodate the ends of enti-friction rollers218-38, The width of seid grooves 37 taken transversely of theanti-friction rollersris greater than the di'- ameters of the rollers inorder to permit the latter iree rolling movement while :it the same timelimiting the amount of such movement. Orti-lie side corresponding toVthe face 33,.the..olocli.32 is recessed iis indii5 cated at 39, in,which is also seated another narrower wcariplate 40 to act as u.lieiirinV surface of the anti-friction roller 41 whici is common to thetwo units. 'I lierecees 89 are sulliciently wide to permit free rollingmovement of the roller 41. At i s end,

euch bloclcl is preferida] provided with iin annular boss 42 adapte toengage and receive pressure from the corresponding-in.- termedatefollower 19 or 20. When the viredgging` device is assembled with theother parte of the' friction mechanism proper, the over-all length `infull released condition of the parts will be slightly greater than thelength of theplates 25 so that, as pressure :i0 is applied to theweclging device, the two units may move relatively to each other thesmell amount necessary to set up the expansion of the wedging device andto ermite the necessary lateral or transverse pressure prior to eitherfollower 19 o r 20 engaging the ends of the movable plates 25.

In operation, assuming an inward or bufiing movement of 'the druwbai,the front ma'in follower 17 will be forced rearwardly.

40 As the follower 17 moves rearwardly, it is ,afforded a yieldingresistnncc by the front springs 21 and an intiiil wodging action willlie sct up, due to the resistance nfl'orded the follower 20 by theSprings 22. As the in- Lie ward movement of the follower 17 conY tinnes,and as thev spring resistance rises. movement of the follower 19 willcommence until it picks up the plates und there- 4after the resistancewill be .gradually in- 5u creased; due to the increasing resistanceafpression of the rearspring. In release, it

is evident tliot-tlie front springs 21 are free to expand, therebyrelieving pressure ou the front end of the4 wedgin device. The wedging.,device being of tru y onti-fi-iction charcoter both with respect to theunits coniposing it and with respect to the deva-v ne an entirety` inits enf-finement with the in` 'nerinost pair of moviililcplaios 25, willrcedily collapse and thcrebv permit the roar b springs to expand undforce the wedgiiig device :iiidtlie movable :plates back to their normalposition, in which at least one of the intermediate followers will bespaced from the adjacent ends of the plates. It is liclievedtluit the.action under draft will he understood without further detailedexplanation, inasmuch as the suine sequence of operations will occuralthough in the reverse direction.

I have herein shown und described whnt I now consider the preferred iniinnei of carrying out the invention lint the sume is merel;fillustrative und IV contemplate iill changes lind modifications thatrome 'within the scope of the clnlms appended hereto.

l claim:

l. lne friction shock absorbing mocha,- nisin for railway draft rigginghaving?,v draft sills, tli combination with tandem arranged springs and.followers; of a friction device interposed between the intermediatefollowers, said friction device including, a cosing rigid with sii-idsills, e plurality ofrigid friction plates retained by' sii-id casingagainst longitudinal movement relative to the sillsrn plurality oflongitudinnll)r mov able friction plates interrelated with saidstationary plates and nrlzipted to lie engaged and actuated by seidintermediate followers` and u weglging device interposed between saidintermediate followers operable in either direction to increase thepressure on. said plates upon nctuiitioir of said intermediatefollowers.

2. 'In ai railway di'nft rigging, the combination with draft sillshavingfront and rear sets of stop lugs; of front and renimoin followers; frontandA reni' spring units on thc inner sides of said followersresbectivcly; a rent-rally disposed casing rigidly sei-.urod to saidsills: ii plurality of rigid Jfriction platos retained hy seid casingagainst longitudinal movementiilative 'to the sills: ai plurality oflongitudinally movable friction plates alterniited with said rigidplates and of greater length; a pair of intermediair` followers. one oneach side of Huid riisn und each adapted to. engage thc inner enf of oneof. siiid spring units;

und :i edging dci-'ive interposed between siiid intermediate followers,operable in either direction to inca-ense the pressure on said plates'upon actuiition of' said intermediate followers. said rigid und movableplete; boing arranged in two groups, one on either side of the centerline of the mecha nis-.fn und said wedging device being inter` Y posedbetween the two groups.

3. In u friction shock absorbing mechauisin for railway draft rigginghaving draft sills. the combination with tandem er1-ringed springs andfollowers; of u friction device interposed between the intermediatefollowL ers` sold friction device including a Casin rigid with .saidsills, n plurality of rigi friction plates retained by said casingagainst longitudinal movement relative to the sills, a plurality oflongitudinally movable friction plates intercalated with said rigidplates and adapted to be engaged and actuated by said intermediatefollowers, and a -wedging device interposed between said intermediatefollowers operable in either direction to increase the pressure 0n Saidplates upon actuation of said intermediate followers, the over-alllength of said wedging device being slightly greater than the length ofthe movable friction lates.

4. In a friction shock absor ing mechanism, the combination with tandemarranged springs and followers; of a friction devi interposed betweenthe intermediate followers, said friction device including, a stationarycasing, a plurality of relatively stationary' friction plates retainedby sai casing, a plurality of relatively movable friction plates.intercalated `with said stationary plates and adapted to be engaged andactuated b said intermediate followers, and a we ging device interposedbetween said intermediate followers adjacent the intere-slated plates,said wedging device being located 'nearest the movable plates andoperable to increase the pressure on said ,intcrcalated plates uponactuation of said intermediate followers, said wedging device comprisingtwo like units oppositely arranged, said units having anti-frictionmeans interposed therebetween and antifriction means between each unitand corresponding adjacent movable friction plate.

5. In a railway draft rigging, the combination with draft sills havingfront and rear sets of stop lugs secured thereto; of a stationary casingsecured to said sills intermediate said sets of stop lugs; a pluralityof relatively stationary friction plates retained by said casing; aplurality of relatively movable friction plates alternated with saidstationary plates. said stationary and movable 'plates being arranged intwo groups. one on either side of the center line of the mechanism witha movable plate of ach group arranged innermost, said movable platesbeing of greaterlength than the dimension of said casing parallel to thecenterline of the mechanism; a wedging device interposed between saidtwo groups of plates, said wedging device having anti-- able with thecorres ending adjacent inner movable friction p ate, @saidanti-.friction means being supported and carried by a holding meansforming a art of the Wedging device and movable t erewith and the normalover-all length of said wedging device being slightly greater than thelength of said movable plates; a follower at each end of said wedgingdevice and normally in engagement. therewith; a main end follower inengagement with each set of 4stop lugs; and a spring resistanceinterposed between each end main follower and adjacent intermediatefollower.

6. In a railway draft rigging, the com bination of draft sills havingfront and rear sets of stop lugs secured thereto; of a stationary casingsecured to said sills intermediate said sets of stop lugs; a lurality ofstationary plates carried by said) casing; a plurality of relativelymovable, friction Iplates alternated with said stationary plates, saidstationary and movable plates being ar ranged in Vtwo groups, one oneither side of the center line of the mechanism. said movable platesbeing of greater length than the dimensions of said casing parallel tothe center line of the mechanism; a wedging device interposed betweensaid two groups of interposed plates, said wedging device beingexpansible laterally and having antifriction means on each side thereof,engageable with the corresponding adjacent friction plates. saidanti-friction means being so mounted as to have lateral movement in thedirection of the expansion of the wedging device and the normal over-alllength of said wedging device bein slightly greater than the length ofsai movable plates; a follower at each end of said wedging device andnormally in engagement there itl1:a main end follower in engagement witheach set of stop lugs; and a springresistanee interposed between eachvend main follower and adjacent intermediate follower,

l'i witness that I claim the foregoing l have hereunto subscribed myname this th (lay 0f' Der., i920.

' WILLIAM A. GEGER. 1Wi tnesses CARRIE Gammo, UNA PnniN.

